Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(14)

Side by Side Diff: media/audio/audio_output_device.cc

Issue 10826296: Introduce shared_memory_support media target for PPAPI (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Rebase. Created 8 years, 3 months ago
Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.
Jump to:
View unified diff | Download patch | Annotate | Revision Log
« no previous file with comments | « media/audio/audio_output_controller.cc ('k') | media/audio/audio_output_device_unittest.cc » ('j') | no next file with comments »
Toggle Intra-line Diffs ('i') | Expand Comments ('e') | Collapse Comments ('c') | Show Comments Hide Comments ('s')
OLDNEW
1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #include "media/audio/audio_output_device.h" 5 #include "media/audio/audio_output_device.h"
6 6
7 #include "base/debug/trace_event.h" 7 #include "base/debug/trace_event.h"
8 #include "base/message_loop.h" 8 #include "base/message_loop.h"
9 #include "base/threading/thread_restrictions.h" 9 #include "base/threading/thread_restrictions.h"
10 #include "base/time.h" 10 #include "base/time.h"
11 #include "media/audio/audio_output_controller.h" 11 #include "media/audio/audio_output_controller.h"
12 #include "media/audio/audio_util.h" 12 #include "media/audio/audio_util.h"
13 #include "media/audio/shared_memory_util.h"
13 14
14 namespace media { 15 namespace media {
15 16
16 // Takes care of invoking the render callback on the audio thread. 17 // Takes care of invoking the render callback on the audio thread.
17 // An instance of this class is created for each capture stream in 18 // An instance of this class is created for each capture stream in
18 // OnStreamCreated(). 19 // OnStreamCreated().
19 class AudioOutputDevice::AudioThreadCallback 20 class AudioOutputDevice::AudioThreadCallback
20 : public AudioDeviceThread::Callback { 21 : public AudioDeviceThread::Callback {
21 public: 22 public:
22 AudioThreadCallback(const AudioParameters& audio_parameters, 23 AudioThreadCallback(const AudioParameters& audio_parameters,
(...skipping 223 matching lines...) Expand 10 before | Expand all | Expand 10 after
246 247
247 AudioOutputDevice::AudioThreadCallback::~AudioThreadCallback() { 248 AudioOutputDevice::AudioThreadCallback::~AudioThreadCallback() {
248 } 249 }
249 250
250 void AudioOutputDevice::AudioThreadCallback::MapSharedMemory() { 251 void AudioOutputDevice::AudioThreadCallback::MapSharedMemory() {
251 shared_memory_.Map(TotalSharedMemorySizeInBytes(memory_length_)); 252 shared_memory_.Map(TotalSharedMemorySizeInBytes(memory_length_));
252 } 253 }
253 254
254 // Called whenever we receive notifications about pending data. 255 // Called whenever we receive notifications about pending data.
255 void AudioOutputDevice::AudioThreadCallback::Process(int pending_data) { 256 void AudioOutputDevice::AudioThreadCallback::Process(int pending_data) {
256 if (pending_data == AudioOutputController::kPauseMark) { 257 if (pending_data == kPauseMark) {
257 memset(shared_memory_.memory(), 0, memory_length_); 258 memset(shared_memory_.memory(), 0, memory_length_);
258 SetActualDataSizeInBytes(&shared_memory_, memory_length_, 0); 259 SetActualDataSizeInBytes(&shared_memory_, memory_length_, 0);
259 return; 260 return;
260 } 261 }
261 262
262 // Convert the number of pending bytes in the render buffer 263 // Convert the number of pending bytes in the render buffer
263 // into milliseconds. 264 // into milliseconds.
264 int audio_delay_milliseconds = pending_data / bytes_per_ms_; 265 int audio_delay_milliseconds = pending_data / bytes_per_ms_;
265 266
266 TRACE_EVENT0("audio", "AudioOutputDevice::FireRenderCallback"); 267 TRACE_EVENT0("audio", "AudioOutputDevice::FireRenderCallback");
267 268
268 // Update the audio-delay measurement then ask client to render audio. 269 // Update the audio-delay measurement then ask client to render audio.
269 size_t num_frames = render_callback_->Render( 270 size_t num_frames = render_callback_->Render(
270 audio_bus_.get(), audio_delay_milliseconds); 271 audio_bus_.get(), audio_delay_milliseconds);
271 272
272 // Interleave, scale, and clip to int. 273 // Interleave, scale, and clip to int.
273 // TODO(dalecurtis): Remove this when we have float everywhere: 274 // TODO(dalecurtis): Remove this when we have float everywhere:
274 // http://crbug.com/114700 275 // http://crbug.com/114700
275 audio_bus_->ToInterleaved(num_frames, audio_parameters_.bits_per_sample() / 8, 276 audio_bus_->ToInterleaved(num_frames, audio_parameters_.bits_per_sample() / 8,
276 shared_memory_.memory()); 277 shared_memory_.memory());
277 278
278 // Let the host know we are done. 279 // Let the host know we are done.
279 SetActualDataSizeInBytes( 280 SetActualDataSizeInBytes(
280 &shared_memory_, memory_length_, 281 &shared_memory_, memory_length_,
281 num_frames * audio_parameters_.GetBytesPerFrame()); 282 num_frames * audio_parameters_.GetBytesPerFrame());
282 } 283 }
283 284
284 } // namespace media. 285 } // namespace media.
OLDNEW
« no previous file with comments | « media/audio/audio_output_controller.cc ('k') | media/audio/audio_output_device_unittest.cc » ('j') | no next file with comments »

Powered by Google App Engine
This is Rietveld 408576698